Everything you need to know about weight plates

Weight plates are used to increase the intensity of exercise routines performed in gyms and physical training centers. They can be used to work out most of the body's muscle groups and are primarily responsible for gaining muscle mass through the repetition of various predefined exercise sequences.

The plates that make up the weights are durable and very compact elements. What material is used to manufacture them? What makes them so strong? Can they break in any way? Keep reading and we will tell you everything.

What types of sports can be performed with weight plates?

Weight plates are used in various sports to increase the intensity of exercises. While in some sports the weight is predetermined, in others it is customized by adding or removing these plates. Each user can use the amount of weight that best suits their physical capabilities.

One of the most popular sports that uses these weight plates is Crossfit, characterized by its high intensity, but they are also used in other sports where weight plays a significant role.

For example, in weightlifting or powerlifting, it is essential to measure the weight very precisely to match the athletes' physical conditions. This way, it is possible to find the perfect balance between physical effort and capacity, exercising the muscles without exposing them to injury.

What are weight plates made of?

Generally, weight plates are made of cast iron. It is a hard and very strong material, malleable, and gives the plate a high level of resistance. This is ideal for this purpose, as they are often handled roughly during exercise routines and are exposed to a very high level of wear.

Nowadays, rubber plates with professional handles are widely used to cushion impacts if dropped on the floor and to improve grip. However, it is still advisable to avoid hitting feet or other body parts with them and, if possible, handle them on a rubber floor or another material capable of absorbing impacts without causing damage.

Cast iron is an ideal material for manufacturing these weight plates because it can be shaped at high temperatures, and when cooled, it becomes a highly resistant, solid, very compact material that can take any shape a mold can give it.

In fact, solid iron has been used to make bodybuilding equipment for decades. As early as the 19th century, balls made of this material were used to exercise the body. These balls were attached to a bar by hollow spheres.

The concept evolved, the balls were replaced by weight plates, which are easier to handle due to their flat structure despite their weight. This new concept was adopted in the 20th century and continues to this day, with incredibly durable iron plates like those used for Body Pump.

Over time, and for the sake of safety, some Olympic plates have been made from polyurethane. It is a more expensive material but offers an extra level of safety and durability. Therefore, these plates are usually intended for official competitions.

Are other materials used to manufacture weight plates?

Unpainted weight plates are usually made of iron, and their weight can be distinguished by the reliefs on their surface. However, those using the color code are typically made of very dense rubber. Paint alone would eventually wear off the iron surface, making handling uncomfortable and leaving paint residue on the hands.

In contrast, using rubber facilitates the use of color, as it is an inherent part of the material. Other plates may be made of urethane, which has similar characteristics but is much more durable, although it is too expensive for those looking for a more budget-friendly option.

However, that does not mean it is impossible to buy high-quality rubber plates. In fact, at Fitness Tech, we offer a wide variety of plates in our bumper plates section, where users can find a broad range of weight plate kits made of both rubber and iron.

How are rubber weight plates made? Typically, virgin rubber is processed until it achieves a very smooth texture, then it is cut into discs slightly larger than the iron center.

Next, the rubber is placed in a mold that includes the steel hub, and a machine heats and compresses the rubber disc to achieve the precise dimensions. This results in a plate of the desired weight with a very small margin of error.

Why do some plates have different colors?

Although it is common to find weight plates plain, without decorations (at most, some branding or logos, as with pasta plates used on bars), it is possible to find plates in different colors. Does this mean they are made of a lighter material?

Not at all. In fact, color codes are used so users can quickly differentiate the various weights available at a glance.

The color black is usually reserved for the lightest plates. Since cast iron is dark when cooled, it is often left unpainted or painted black. These plates are typically up to 5 kilograms.

White may also be used to differentiate lighter plates, distinguishing them from unpainted plates that show the natural color of cooled iron. This type of plate is commonly used for exercises involving both upper and lower body, where the user needs lighter training weights, often used by beginners or to slightly increase the bar weight.

Green plates are 10 kilograms. They are used for low to medium resistance levels and moderate weight increments.

Yellow plates weigh 15 kilograms. These are not used for small weight adjustments but to avoid placing multiple plates on the bar. Instead of using a green and a black or white plate to total 15 kilograms, a single yellow plate is used, saving time and making it more convenient to load and unload the bar.

Blue plates are the second heaviest, weighing 20 kilograms. They are reserved for those with experience in weightlifting or who want to maximize their effort during workouts.

The same applies to red plates, which weigh 25 kilograms, used by those with the most developed musculature and endurance. Like the 15-kilogram plates, they are designed to facilitate handling exact amounts by using a single plate instead of combining a blue and a black or white plate to reach the same weight.